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JaynTinks wrote:They said his eyes were dilated cos of over stimulation cos of playing with ball, so I reduced amount of ball play, his pupils were still mostly dilated unless lights were VERY bright, which he didn't like and goes in shade when sun is really bright. This doesn't make sense to me, and I'd let him play all he wanted if he were mine. If he's dilated, it makes sense that he doesn't like bright light. I expect the dilation is from whatever has his eyes wonky.
He misjudges catching smaller balls more catching them the tip of his nose instead of his mouth and usually sending them over the fence! , though not if its a whistling ball or I give him lots of voice clues. Good idea to use noisy toys; that should help a lot.
He used to growl if you just went up to him and tried to put on a coat or harness or dry him but if you tell him what you are doing first so he knows what's coming he's fine.If you take him out in public, you might want to get him a coat or shirt announcing that he's blind. I don't know where they come from, but I think Karen A used them, especially for those who might startle or nip if surprised.
My guess would be for some reason his brain is not processing the amount of light properly or its letting in too much light making it difficult for him to see detail. MRI's and such to check optic nerves and brain activity would be costly so I'm going to attempt to teach him to read flashcards (a trick my old girl could do before she went blind) If he's sighted he should be able to see them and learn, if not he won't. He's certainly intelligent enough. Interesting idea!
If you put three toys in front of him and ask him to find the ball (for example) he seems to do this better within a certain distance, if you put them further away he has to run in that direction and sniff each toy as if to determine which one is which (not using sight from where he was sat to watch where I put it then run straight to it) If you throw it he'll spin around listen for it landing then run to it. ..so I'm perplexed as to why nothing would be showing up in the eye unless it was a problem with processing information from the eye to the brain? In theory, it could also be a problem with visual processing--brain. In humans it's called Cortical Visual Impairment (CVI), although in my experience CVI is a vastly overused diagnosis.
Uk forums don't seem very knowledge but I worked with blind and deafblind kids and kids with sensory issues (autism) so know it can be possible for something to appear to look normal (ie the child's eye) but the brain not be able to take the information in. I find American forums often study these things in more detail and owners with pets with disabled and medical conditions are more knowledge about the technical details that may help me?
JaynTinks wrote:Interestingly I just found this (though it relates to a person with CVI)
"it is often possible for the person to detect and track movement. Movement is handled by the 'V5' part of the visual cortex, which may have escaped the damage. Sometimes a moving object can be seen better than a stationary one" I think that's true of critters.
I'll look into whether this would be the same for dogs as Jay can track movement and its definitely the movement rather than the object if you get what I mean as several times we have passed a cat and he's obviously not seen it, it was fairly close but sat absolutely still but he has moved as if about to chase even if item is a bird, bit of rubbish blowing past in wind etc... so I think it's more that he's seeing something moving fast rather than for example has a thing about chasing cats as he's passed a few and doesn't seem to recognise them if they don't move!
Another test I've done with a toy in front of him on the floor if I move it slowly he can take it or leave it, if I move it fast past or away from him he's instantly in chase mode again! ..so again it seems its the movement rather than the toy itself. The toys he tends to gravitate to make a noise or have texture. He loves a (soft toy) maraca I had got for Inca when she went blind that makes different sounds as you move it (or throw it) he quickly learned if he held it by the end (handle) and shook his head from side to side it made a whole range of different noises.Yes, noisy toys tend to be a hit when the eyes aren't so great. My disabled ones who became disabled very young, regardless of disability, also tend to be FAR more bitey/mouthy than able-bodied furmonsters.
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